Revealing mistake: When Gunn, Fred and Lorne run out to the Las Vegas strip, a large crowd of bystanders can be see seen in the background watching the show being filmed (as said in the DVD commentary).

Cordelia: You want I should distract him? Make with the nice-nice while you slip by?Angel: Don't be stupid. I'm that guy and the most beautiful woman I've ever seen is making eyes at me? It's either a bachelor party or a scam.Cordelia: What did you just call me?Angel: I'm sorry. You're not stupid.Cordelia: No, after that.